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