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