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