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