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