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