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