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