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