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