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