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