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