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