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)(19,29,31,24)(20,26,21,34)(23,38,37,28)(25,36,42,33)(30,40,35,43)(32,41,47,45)(39,46,44,48)(2,6)(4,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,30)(21,35)(22,31)(23,32)(25,39)(26,43)(27,29)(28,41)(33,46)(34,40)(36,48)(37,47)(38,45)(42,44) involution — undirected(1,3,5,8)(2,7,6,4)(9,11)(10,13)(12,16)(14,15)(17,20)(18,25)(19,30)(21,22)(23,36)(24,39)(26,38)(27,42)(28,34)(29,44)(31,35)(32,48)(33,37)(40,41)(43,45)(46,47)(2,6)(3,8)(11,16)(13,15)(17,21,22,20)(18,26,27,34)(19,30,31,35)(23,36,37,33)(24,40,29,43)(25,28,42,38)(32,46,47,48)(39,45,44,41)(1,4,5,7)(2,8,6,3)(10,14)(13,15)(20,21)(25,42)(26,34)(30,35)(33,36)(39,44)(40,43)(46,48)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.