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