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