One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,8)(3,10,12,7)(4,14,15,9)(5,13,16,11)(21,29)(26,30)(27,32)(28,31)(33,34)(35,40)(36,43)(37,42)(38,41)(39,44)(45,47)(46,48)(1,3)(2,7)(4,11)(5,9)(6,12)(8,10)(13,15)(14,16)(17,18)(19,24)(20,25)(21,26)(22,23)(27,31)(28,32)(29,30)(33,35)(34,37)(36,45)(38,46)(39,42)(40,44)(41,47)(43,48) involution — undirected(2,8)(3,12)(9,14)(11,13)(18,23)(20,24)(26,30)(28,31)(33,35)(34,40)(36,45)(37,44)(38,46)(39,42)(41,48)(43,47) involution — undirected(1,4,6,15)(2,9,8,14)(3,13,12,11)(5,7,16,10)(17,19,22,25)(18,24,23,20)(21,27,29,32)(26,31,30,28)(33,36,39,38)(34,41,44,43)(35,45,42,46)(37,47,40,48)(1,3)(2,10)(4,13)(5,9)(6,12)(7,8)(11,15)(14,16)(17,20,22,24)(18,25,23,19)(21,28,29,31)(26,32,30,27)(33,37,39,40)(34,42,44,35)(36,47,38,48)(41,46,43,45)(1,5)(2,11)(3,9)(4,7)(6,16)(8,13)(10,15)(12,14)(17,21)(18,26)(19,27)(20,28)(22,29)(23,30)(24,31)(25,32)(33,38,39,36)(34,43,44,41)(35,46,42,45)(37,48,40,47)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.