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