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