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