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