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