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