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