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