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