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