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