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