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