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