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