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