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