One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6,11,14)(7,15,9,18)(8,13,10,19)(12,17,20,16)(21,22,26,30)(23,31,34,35)(24,29,25,28)(27,32,36,33)(5,7,11,9)(6,12,14,20)(8,16,10,17)(13,18,19,15)(23,32)(24,25)(27,35)(28,29)(31,36)(33,34)(2,4)(5,8,11,10)(6,13,14,19)(7,16,9,17)(12,18,20,15)(21,23,26,34)(22,27,30,36)(24,32,25,33)(28,35,29,31)(5,9,11,7)(6,12,14,20)(8,17,10,16)(13,18,19,15)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.