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