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