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