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