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