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