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