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