One vertex per element, one color per generator, with an edge from x to x·s.
(9,10)(11,13)(12,16)(14,15)(18,23)(19,26)(25,31)(27,28) involution — undirected(1,2)(3,8)(4,6)(5,7)(10,15)(11,16)(17,18)(19,24)(20,25)(21,26)(22,23)(27,32)(28,29)(30,31) involution — undirected(1,3)(2,4)(5,6)(7,8)(9,11,14,16)(10,12,15,13)(19,26)(21,24)(27,28)(29,32)(3,6)(4,8)(9,12,14,13)(10,11,15,16)(17,19,22,26)(18,24,23,21)(20,28,30,27)(25,29,31,32)(1,4,5,8)(2,6,7,3)(9,10)(11,12)(13,16)(14,15)(17,20,22,30)(18,25,23,31)(19,27,26,28)(21,29,24,32)(1,2)(3,8)(4,6)(5,7)(9,13,14,12)(10,16,15,11)(17,21,22,24)(18,26,23,19)(20,29,30,32)(25,28,31,27)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.