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