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