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