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