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