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