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