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