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