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