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