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