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