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