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