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