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