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