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