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