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