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