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