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