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)(26,36)(31,39)(32,40)(33,38)(35,42)(37,41)(43,44)(45,48)(46,47)(1,2)(3,6)(4,5)(7,8)(11,12)(14,15)(17,19)(18,24)(20,31)(21,32)(22,30)(23,33)(25,40)(26,39)(27,38)(28,29)(34,43)(35,45)(36,44)(37,46)(41,48)(42,47) involution — undirected(9,11,13,12)(10,14,16,15)(18,25)(19,30)(21,23)(24,38)(26,41)(27,28)(29,40)(31,44)(34,42)(35,37)(39,47)(43,48)(2,5)(6,7)(9,12,13,11)(10,15,16,14)(17,20,22,36)(18,26,28,34)(19,31,30,44)(21,37,23,35)(24,39,29,43)(25,41,27,42)(32,46,33,45)(38,47,40,48)(1,3,4,8)(2,6,5,7)(10,16)(14,15)(17,21,22,23)(18,27,28,25)(19,32,30,33)(20,35,36,37)(24,38,29,40)(26,41,34,42)(31,45,44,46)(39,48,43,47)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.