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