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