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