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