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