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