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