One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,9)(3,5,11,7)(4,8,12,15)(10,13,16,14)(17,18,22,28)(19,26,30,23)(20,25,31,24)(21,29,32,27)(33,34,38,40)(35,36,42,44)(37,39,46,45)(41,43,48,47)(4,12)(8,15)(10,16)(13,14)(17,19)(18,23)(20,29)(21,25)(22,30)(24,32)(26,28)(27,31)(33,35)(34,36)(37,41)(38,42)(39,43)(40,44)(45,47)(46,48) involution — undirected(1,3,6,11)(2,7,9,5)(4,10,12,16)(8,14,15,13)(17,20,22,31)(18,24,28,25)(19,29,30,27)(21,23,32,26)(33,36,38,44)(34,35,40,42)(37,43,46,47)(39,41,45,48)(1,3)(2,5)(4,10)(6,11)(7,9)(8,13)(12,16)(14,15)(17,20)(18,25)(19,29)(21,23)(22,31)(24,28)(26,32)(27,30)(33,36)(34,35)(37,43)(38,44)(39,41)(40,42)(45,48)(46,47) involution — undirected(1,4,6,12)(2,8,9,15)(3,10,11,16)(5,13,7,14)(17,19)(18,26)(20,29)(21,24)(22,30)(23,28)(25,32)(27,31)(33,37,38,46)(34,39,40,45)(35,41,42,48)(36,43,44,47)(1,5)(2,3)(4,13)(6,7)(8,10)(9,11)(12,14)(15,16)(17,21,22,32)(18,27,28,29)(19,25,30,24)(20,23,31,26)(33,34)(35,36)(37,45)(38,40)(39,46)(41,47)(42,44)(43,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.