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