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