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