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)(17,18,23,27)(19,21,29,24)(20,30,31,25)(22,26,28,32)(1,3)(2,5)(4,8)(6,7)(17,19)(18,24)(20,25)(21,27)(22,32)(23,29)(26,28)(30,31) involution — undirected(10,14)(15,16)(17,20)(18,25)(19,28)(21,26)(22,29)(23,31)(24,32)(27,30) involution — undirected(2,6)(5,7)(9,11,13,12)(10,15,14,16)(17,21,23,24)(18,19,27,29)(20,26,31,32)(22,25,28,30)(3,8)(5,7)(9,12,13,11)(10,16,14,15)(17,22,23,28)(18,26,27,32)(19,20,29,31)(21,30,24,25)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.