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