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