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