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