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