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