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