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