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