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