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