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