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