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