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