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)(11,15)(12,16)(13,14)(17,18)(19,23)(20,30)(21,24)(22,25)(26,28)(27,31)(29,32) involution — undirected(2,6)(7,8)(10,14)(11,12)(17,19)(18,23)(20,26)(21,27)(22,29)(24,31)(25,32)(28,30) involution — undirected(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,15,14,16)(17,20,30,18,22,24,21,25)(19,26,28,23,29,31,27,32)(1,4,5,3)(2,8,6,7)(11,12)(15,16)(17,21,22,30)(18,24,25,20)(19,27,29,28)(23,31,32,26)(9,12,13,11)(10,16,14,15)(17,21,22,30)(18,24,25,20)(19,28,29,27)(23,26,32,31)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.