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