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