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