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