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