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