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