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