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