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