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