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