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