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