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