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)(17,18,22,19,21,25,31,28)(20,23,30,26,29,24,32,27)(1,3)(2,5)(4,8)(6,7)(17,19,22,25,21,28,31,18)(20,27,30,23,29,26,32,24)(3,8)(5,7)(10,13)(14,16)(17,20)(18,23)(19,26)(21,29)(22,30)(24,25)(27,28)(31,32) involution — undirected(2,6)(5,7)(17,20)(18,24)(19,27)(21,29)(22,30)(23,25)(26,28)(31,32) involution — undirected(9,11,12,15)(10,14,13,16)(20,29)(23,24)(26,27)(30,32)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.