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