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