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