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