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