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