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