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