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