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)(17,18,22,23)(19,21,25,29)(20,24,27,30)(26,28,31,32)(33,34,40,38)(35,36,45,41)(37,47,42,39)(43,48,46,44)(3,9)(7,13)(10,15)(14,16)(17,19,22,25)(18,21,23,29)(20,26,27,31)(24,28,30,32)(33,35,40,45)(34,41,38,36)(37,43,42,46)(39,48,47,44)(2,6)(7,13)(8,11)(14,16)(18,23)(19,25)(20,27)(28,32)(33,36)(34,35)(37,48)(38,45)(39,46)(40,41)(42,44)(43,47) involution — undirected(1,2)(3,7)(4,8)(5,6)(9,13)(10,14)(11,12)(15,16)(17,20)(18,24)(19,26)(21,28)(22,27)(23,30)(25,31)(29,32)(33,37)(34,39)(35,43)(36,44)(38,47)(40,42)(41,48)(45,46) involution — undirected(1,3)(2,7)(4,10)(5,9)(6,13)(8,14)(11,16)(12,15)(17,19)(18,21)(20,26)(22,25)(23,29)(24,28)(27,31)(30,32)(33,38,40,34)(35,41,45,36)(37,47,42,39)(43,48,46,44)(1,4)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(17,21)(18,19)(20,28)(22,29)(23,25)(24,26)(27,32)(30,31)(33,39,40,47)(34,42,38,37)(35,44,45,48)(36,46,41,43)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.