One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,12)(4,14)(5,6)(7,9)(8,13)(10,16)(11,15)(17,18)(19,23)(20,28)(21,22)(24,30)(25,27)(26,32)(29,31)(33,34,39,42)(35,40,43,38)(36,37,41,47)(44,45,48,46)(1,3,7,13)(2,8,9,12)(4,15,16,5)(6,10,11,14)(17,18)(19,25)(20,24)(21,22)(23,27)(26,32)(28,30)(29,31)(33,35,39,43)(34,40,42,38)(36,44,41,48)(37,45,47,46)(2,9)(6,11)(8,12)(10,14)(18,22)(23,25)(24,28)(31,32)(35,43)(38,40)(44,48)(45,46) involution — undirected(1,4,7,16)(2,10,9,14)(3,5,13,15)(6,12,11,8)(17,19)(18,23)(20,29)(21,27)(22,25)(24,32)(26,30)(28,31)(33,36)(34,37)(35,44)(38,46)(39,41)(40,45)(42,47)(43,48)(1,5)(2,11)(3,4)(6,9)(7,15)(8,14)(10,12)(13,16)(17,20,21,30)(18,24,22,28)(19,26,27,29)(23,31,25,32)(33,37)(34,41)(35,45)(36,42)(38,44)(39,47)(40,48)(43,46)(1,6,7,11)(2,5,9,15)(3,10,13,14)(4,12,16,8)(17,18)(19,23)(20,24)(21,22)(25,27)(26,31)(28,30)(29,32)(33,38)(34,35)(36,46)(37,44)(39,40)(41,45)(42,43)(47,48)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.