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