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