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