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)(19,25)(23,26)(27,31)(30,32)(33,34)(35,36)(37,40)(38,46)(39,42)(41,48)(43,45)(44,47) involution — undirected(2,7)(4,9)(5,14)(11,16)(17,18)(19,23)(20,28)(21,22)(24,29)(25,26)(27,32)(30,31)(33,35,39,40)(34,36,42,37)(38,47,48,43)(41,45,46,44)(2,7)(3,10)(8,13)(11,16)(18,22)(23,26)(24,28)(30,32)(33,36,39,37)(34,40,42,35)(38,44,48,45)(41,47,46,43)(1,3,6,10)(2,4,7,9)(5,11,14,16)(8,12,13,15)(17,18)(19,26)(20,24)(21,22)(23,25)(27,32)(28,29)(30,31)(33,34)(35,36)(37,40)(38,41)(39,42)(43,44)(45,47)(46,48)(1,4)(2,3)(5,12)(6,9)(7,10)(8,11)(13,16)(14,15)(17,19)(18,23)(20,27)(21,25)(22,26)(24,30)(28,32)(29,31)(33,37,39,36)(34,35,42,40)(38,45,48,44)(41,43,46,47)(1,5,6,14)(2,8,7,13)(3,11,10,16)(4,12,9,15)(17,20,21,29)(18,24,22,28)(19,27,25,31)(23,30,26,32)(33,38,39,48)(34,41,42,46)(35,43,40,47)(36,44,37,45)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.