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