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