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