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