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