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