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)(20,32)(21,36)(22,38)(23,26)(24,30)(25,29)(27,37)(31,44)(33,40)(34,45)(35,48)(39,41)(42,46)(43,47) involution — undirected(1,2,4,6,5,8,11,13)(3,7,10,12,9,14,15,16)(17,19,21,30,23,31,37,22)(18,24,27,28,26,38,36,44)(20,29,34,47,33,46,35,39)(25,40,41,45,42,32,43,48)(1,3)(2,7)(4,10)(5,9)(6,12)(8,14)(11,15)(13,16)(17,20,23,33)(18,25,26,42)(19,29,31,46)(21,34,37,35)(22,39,30,47)(24,40,38,32)(27,41,36,43)(28,45,44,48)(2,8)(3,9)(6,13)(10,15)(18,26)(20,33)(24,38)(27,36)(28,44)(29,46)(34,35)(39,47) 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.