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