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