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