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