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