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