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