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