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