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