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