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