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