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