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