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)(11,16)(12,14)(13,15)(19,26)(20,23)(27,31)(28,29)(1,3,5,8)(2,6,4,7)(9,11,13,12)(10,14,15,16)(17,18)(19,20)(21,24)(22,25)(23,26)(27,28)(29,31)(30,32)(10,15)(14,16)(17,19,22,26)(18,23,25,20)(21,27,30,31)(24,29,32,28)(9,10)(11,14)(12,16)(13,15)(17,19)(18,20)(21,27)(22,26)(23,25)(24,28)(29,32)(30,31) involution — undirected(1,2,5,4)(3,6,8,7)(9,12,13,11)(10,16,15,14)(17,20)(18,19)(21,29)(22,23)(24,31)(25,26)(27,32)(28,30)(1,4,5,2)(3,7,8,6)(17,21,22,30)(18,24,25,32)(19,27,26,31)(20,28,23,29)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.