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