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