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